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GPS Solutions

, Volume 20, Issue 2, pp 159–171 | Cite as

A study on the dependency of GNSS pseudorange biases on correlator spacing

  • André HauschildEmail author
  • Oliver Montenbruck
Original Article

Abstract

We provide a comprehensive overview of pseudorange biases and their dependency on receiver front-end bandwidth and correlator design. Differences in the chip shape distortions among GNSS satellites are the cause of individual pseudorange biases. The different biases must be corrected for in a number of applications, such as positioning with mixed signals or PPP with ambiguity resolution. Current state-of-the-art is to split the pseudorange bias into a receiver- and a satellite-dependent part. As soon as different receivers with different front-end bandwidths or correlator designs are involved, the satellite biases differ between the receivers and this separation is no longer practicable. A test with a special receiver firmware, which allows tracking a satellite with a range of different correlator spacings, has been conducted with live signals as well as a signal simulator. In addition, the variability of satellite biases is assessed through zero-baseline tests with different GNSS receivers using live satellite signals. The receivers are operated with different settings for multipath mitigation, and the changes in the satellite-dependent biases depending on the receivers’ configuration are observed.

Keywords

Signal biases GNSS Zero baseline Multipath mitigation Signal simulator Chip shape distortions 

Notes

Acknowledgments

Urs Hugentobler (Technische Universität München) and Peter Steigenberger (DLR/GSOC) are gratefully acknowledged for providing two Triumph-VS receiver for the zero-baseline experiment. Javad GNSS is acknowledged for providing a special SVN49 test firmware for the TRE-G3TH receiver.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.German Space Operations CenterDeutsches Zentrum für Luft- und RaumfahrtWesslingGermany

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